Check-valve



N0 Model.)

S. F. PRINCE, Jr. CHECK VALVE.

No. 483,635. v Patented Oct. 4, 1892.

lt I 1:1: 6/ JL -=7//2 .111: 11:: War c UNITED STATES PATENT OFFICE.

SAMUEL F. PRINCE, JR, OF READING, PENNSYLVANIA.

CH EC K-VALVE.

SPECIFICATION forming part Of Letters Patent NO. 483,635, dated October4:, 1892- Applicatlon filed January 2, 1892- $eria1ll'o. 4:16.798. (N0model.)

T0 on whom it may concern:

Be it known that I, SAMUEL F. PRINCE, J r., a citizen of the UnitedStates, residing at Readin g, in the county of Berks, State ofPennsylvania, haveinvented certain Improvements in Check-Valves, ofwhich the following is a specification.

My invention relates to check-valves, and especially to that class inwhich the valve may be arranged to close by gravity no matter at whatpoint or angle the casing is attached to the boiler.

My main object is to provide a valve of this character which will notonly be adapted for use upon either side and at various angles upon theboiler, but which may also be connected both to the boiler and the pipesin the ordinary manner and at the same time permit ready access to theinterior of the casing without breaking such connections, either foradjusting or removing the valve-seat and valve or for grinding the valvewithout disturbing the position of the seat or breaking the joint bywhich it is attached to the casing. The improvements in constructionwhereby I attain these advantages are fully described in connection withthe accompanying drawings, in which- Figure 1 is alongitudinal sectionof a checkvalve embodying all the features of my invention. Fig. 2 is aplan view of the cage alone.

A represents the valvecasing, which is formed with an inlet branch at,an outlet branch 6, (shown at right angles to the inlet branch,) and anopening 0 opposite the latter in a cylindrical extension 0. The branchI) is screw-threaded, as usual, at b for the purpose of securing it tothe boiler, and the branch (1 is likewise threaded at a and providedwith a ground seat a to adapt it for the ordinary pipe connection,consisting of a spanner-nut L, which engages a flange Z upon the end ofthe pipe. The upper portion of the independent opening a isscrew-threaded, while the lower portion 0 which joins the main chamberof the casing, is bored out to a slightlysmaller diameter than thethreaded portion, but sufficiently large to permit the passage of thevalve-cage E, which is introduced through the opening 0 into the mainchamber of the casing. The lower portion 6 of this cage forms anextension of the inlet-passage a, the beveled bottom resting upon aground seat at in the casing, while a valve-seateis provided somedistance above said cage-seat d. The upper end e of the cage fits in theboredportion 0 of the opening 0, and the intermediate portion is open tothe main chamber of the casing and to the outlet-passage b, but is cutoff from the inlet-passageo-by a valve G, which normally falls upon thevalve-seate of the cage. This valve, as represented, is provided with astem 9, which passes through a carrier-arm f, pivoted to lugs on thecage, and is extended to receive a nut g beyond which it projects.

The valve-seat e may be inclined as shown, so that by turning the cageto different positions in the casing the valve may be better arranged tosuit varying locations of the check-valve upon the boiler-shell. Inorder to positively maintain the cage in its proper position when onceascertained and to enable it to be readily returned to such positionwhen removed, I have provided a series of semicircular recesses c in theperiphery of the upper portion of the cage, which register with a singlecorresponding recess 0 in the opening 0 of the casing, so that the cagemay be positively prevented from turning by placing a small piece ofwire in such recesses when brought together. v

The cage E having been placed within the casing, as described, and setto such a position that the pivoted valve will naturally fall to itsseat, is tightly secured therein by means of a screw-sleeve H, thethreaded portion 71; of which is adapted to the threaded opening 0 ofthe casing, so that when its face It comes in contact with the top ofthe cage the base of the latter is pressed against its seat (I in theinlet branch of the casing. This sleeve is provided with a centralopening h, which allows access to the valve for grinding the same bymeans of a suitable tool adapted to engage the projecting valve-stem gwithout loosening the sleeve. The depending circular flange h of thissleeve is also arranged to serve as a stop to limit the lift of thevalve, the stem of which comes in contact with said flange after risinga sufficient distance from its seat. The cap K, which is finally screwedupon the extension C of the casing independently of the sleeve H, servesto close tightly the opening 0. If the valve requires attention, it mayonly be necessary to remove this cap; but if the cage must be taken outor adjusted the sleeve H is also removed, in either case the pipeconnection being unbroken; or, on the other hand, the pipe may bedisconnected, as with an ordinary check-valve, Without disturbing thevalve or seat.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a check-valve, the combination, with the casing having inlet andoutlet branches arranged at an angle to each other and an independentopening thereto, of the valvecage adapted to enter the casing throughsaid opening and provided with an inclined valveseat, means formaintaining said cage at any desired position in the casingcircumferentially, and independent means for pressing it firmly againstits seat, substantially as set forth.

2. In a check-valve, the combination, with the casing having inlet andoutlet branches arranged at an angle to each other and an independentopening thereto, of the valvecage forming an extension of said inletbranch and entering said opening, the exteriorlythe casing having inletand outlet branches arranged at an angle to each other and anindependent opening thereto, of the valvecage and valve seated thereinand the screwsleeve for securing said cage, having a central openingwhereby access may be had to said valve, and a circular flange whichserves to limit the valve-lift, all substantially as and for the purposeset forth.

In testimony whereof I affix my signature in presence of two witnesses.

SAML. F. PRINCE, JR. Witnesses:

W. G. STEWART, P. A. BUSHONG.

